I have a dilema right now, i have this choice between oem head bolts for my metal head gasket or arp head studs. My builder called and said he didnt think the typical ls stud kit will work on the lsa because there is some difference in the block. View detailed images 1 brand new oem replacement flywheel bolt set. What are your thoughts on upgrading from the oem main bolts to the arp studs. The stock washer is a softer metal then the arp, so when you are running high boost i would think the softer washer could imbed into the arp nut causing less clamping force and the head to lift.
Is there that much difference between arp head bolts and oem head bolts, and which ones should i get. The tq spec is nearly double what the factory spec is. Oems stretch at the proper clamp load making them less sensitive to proper installation. We are happy to say that during this national crisis we are still available to assist and support our customers daily. Oem parts, with free shipping, and the same price as manchester honda.
Install the 8mm stainless washers on the remaining 8mm bolts. The great arp head stud washer debate supra forums. The confusion with arp rod bolt fitment relates to ls owners using arp rod bolts for the itrgsr on the ls crank. Both are fasteners and if torqued in order to spec how does an arp squeeze it any differently. Black vs stainless steel arp engine bolts maverickcomet. Each arp accessory stud or bolt kit includes the specific number of parts for your application, plus premiumquality washers and hex or 12point nuts, as required. Studs and bolts come either black oxide chrome moly or stainless 300. I called 3 places and asked about it, all 3 said the same thing. In the old days, arp mislabelled their rod bolts for the ls and people ordered the wrong part number and had to use the 1. Arp also recommends torquing new bolts or studs with nuts several times ahead of the final assembly. Innovators west balancer with arp bolt cadillac ctsv forum. After reading a post a couple months ago it stuck a thought in the back of my head, am i really going to hurt anything by using arp headstuds instead of oem headbolts due to the. Arp stainless steel intake manifold bolt kits 4342101. Oem replacement flywheel bolts honda acura k20 k20a k20a2 k20a3 k20z3 k20z1.
Cj pony parts offers many parts from arp for a wide variety of ford engines. I have no intentions of using any tunes or horsepower upgrades. Heres a perfect instance where we need someone to make an aftermarket block that can handle the power we want to put down, and the tq spec. Arp headstuds vs oem headbolts 4age oil flowclearance. Now i dont have enough for the 272 and sr combo and the arps but i. I dont want to put aftermarket shorty headers and arp bolts etc just want to put new manifolds and replace all bolts with new oem style. I just dont buy the whole arps distort the crank bore and stock bolts dont.
As a side note it should be stated that it is actually 4f hotter than it was yesterday. Arps intake manifold bolts deliver umatched performance. Dont mess with the factory tty bolts either, the last thing you need is a broken head bolt. Arp continues to offer the high performance parts for racing, but also offers oem replacements. Arp studs can be installed with the motor in the jeep, but the head needs to be placed on the block with locators lined up, then thread a stud through the head into the block and so on. Welcome to the north american subaru impreza owners club. Dodge viper srt10 harmonic damper bolt kit new kit. This creates a wear pattern underneath the bolt head or in the area underneath the rod bolt nut. Of course the arp bolts are going to push, twist, and distort the whole align bore. Does anyone know if arp 2542801 flywheel bolts listed as being for 8 bolt setup for 19962004 manual 4. Discussion in ls1, ls2, ls6, lt1, sbc turbo and other gm specfic turbo tech started by mnlx, may 19, 2014. With this all said, i personally run arps for the reasons people mentioned. I got this idea from an e30 forum, where it seems popular to use generic bolts in place of oem on turbo builds. If youre using arps its going to have to be align honed.
If youre using oem, you could get by without, although id definitely recommend it. Home company information contact us trademarks and legal mobile site our site is best viewed with the latest. Hi guys, im planning to build a 351w that can handle up to 600hp fwhp max. Toyota washers are obviously bigger and i understand spread the load over a greater area. I have brand new oem head bolts and arp head studs. I purchesed an arp lsa crank bolt and after pressing the balancer on, i found out that its much too short to use. I decided to prove this out myself, and do back to back tests using stock and arp case bolts on the same set of case halves. Stock rod bolts do not come with a rod bolt stretch number and in this situation, torque is your only option. The vt has a 19qt oil capacity vs the 15qt ps on top of different fluids and i think filter systems. I cant imagine theyd be worse than oem stretch bolts, or even the oem non stretch in a 1. Now that we know the problem, the oem bolts are fine unless youre definitely heading for big turbo. Ill likely go back with oem bolts on mine and likely sell or keep the arp set i have. If it will hold the motor together, i could literally buy 3 sets of oem tty bolts in place of the arp. Those arp main studs originally for toyota 4age, suggested by chris b at arp years ago when we discussed arp engine hardware for the fiat sohc are the way to go as the oem fiat main cap screws screws go into a threaded hole, bolts have nuts on the threaded end.
Arp recommends using the arp ultratorque fastener assembly lubricant as opposed to motor oil. I found a bolt kit that looks exactly the same as stock but every site says it is incompatible with the 5. Nowhere on the box does it mention the part number on the arp site. To ensure proper thread engagement and accurate torque readings, clean all threads in the block. Volkswagenaudi fsitfsi, m9 arp2000 rod bolt kit new kit. Now, it will cost me about the same to get the oem bolts as it would to get arp studs. If youre looking for new fasteners, you cant beat the quality, performance and reliability of the products from arp. My local bmw specialist reckons its 12 hours labour at. Im stuck inbetween choosing the arp bolts vs the arp studs since im on a budget. Since i plan to make this hp with a turbo, i wont be spinning it too high 6000rpm max. My question is would i be fine installing new oem head bolts instead of the arp studs considering im deleting the egr and replacing the coolant and straight piped the exhaust.
Arp stainless steel intake manifold bolts are 15 percent stronger than grade 8 steel bolts and have a widearea flange for better load distribution. I chased the bolt holes with the old bolts and these arp bolts installed perfectly. We could write pages from an engineering stand point to which one is correct. Arp bolts has been engineering and perfecting bolts, studs, nuts, and other fasteners for engines, headers, wheels, and transmissions. Coolant filtration, mbrp 5 turbo back, harley grill, egr delete, harley headlights, ucf oringed heads with arp studs and oem gaskets, 08 taillights, led cab lights, 08 plus mirrors, 2 level on 33 cooper stt pros, and sct x3 with custom tunes. Lubricate the bolt threads with arp ultratorque fastener assembly lubricant. I got these head bolts for a pontiac g8 with the ls3 block and heads.
It seems this is the biggest downfall of the arp head studs. I worked out that you had to do three bearing changes to justify the added cost of the arp bolts. Plenty of people are using them although most use automatic oem flywheel bolts especially people with aluminum flywheels, the theory is that the flywheel is thicker than stock, which you would need longer bolts to make sure you thread it far enough when you torque it down. The advantage of using the arp bolts are that they are easier to torque to spec and are reusable. I read somewhere that the oem bolts might stick out too far and interfere.
It will deform differently than if youre using oem bolts. The 5 speed case does have issue with flex so we will be looking into. Safety and optimum sealing of gasket surfaces for any street or strip vehicle. I am getting the new style head gasket from honda, and the techs told me that i need new bolts for the new gasket. Theyre definitely strong with a 310,000 psi tensile strength but i have a feeling the problem becomes not the bolts physically stretching and yielding. I always replace stock bolts with arp whenever i have the opportunity. Who has done arp rod bolts, and did you have any issues. The turbo, injectors and electronic package are all supplied by ford. One more emphatic yes vote on going with arp studs in place of the torque to yield oem head bolts. Torque to yield head bolts are an answer to machinery that tightens the head bolts. Not sure why, possibly not strong enough or lack of proper locktite.
Stock bolts back out and can sheer once they are loose enough to bang around. Arps site sell the upgraded acl bearings and arp bolts for. Rated at 180,000 psi tensile strength, these intake bolts are precision machined for optimum thread engagement. Ok so got the new chair lol took the oem case bolts out and installed the arp bolts, then carefully torqued them to 60 ftlbs in 3 equal steps 204060 ftlbs like i have done throughout this process. We have stainless steel fasteners for torx, allen, and hexstyle screws for a variety of engine types. Arps are thinner in diameter than oem which doesnt help. Find all of the cylinder head fastening equipment you need to complete your engine repair or rebuild with our vast, instock selection of lowpriced head bolts and head studs for a variety of vehicles, engine types, and cylinder head styles. Also, an oem ls7 bolt has a sealant on the bottom side of the head, should there sealanct on the bottom of the arp bolt and washer.
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